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APPLy Subsystem

The APPLy subsystem allows you to configure entire waveforms with one command. The general form of an APPLy com-

mand is shown below:

[SOURce[1|2]:]APPLy:<function> [<frequency> [,<amplitude> [,<offset>]]]

For example,

APPLy:SIN 1e4,1,0.1

replaces the following commands:

FUNCtion SIN

FREQ 1e4

VOLT 1

VOLT:OFF 0.1

OUTP ON

Not only is APPLy shorter, it avoids settings conflicts that occur when sending commands individually. In addition,

APPLy performs the following operations:

l Sets trigger source to IMMediate (equivalent to TRIGger[1|2]:SOURce IMMediate).

l Turns off any modulation, sweep, or burst mode currently enabled and places the instrument in continuous wave-

form mode.

l Turns on the channel output (OUTPut ON) without changing output termination setting (OUTPut[1|2]:LOAD).

l Overrides the voltage autorange setting and enables autoranging (VOLTage:RANGe:AUTO).

The instrument can generate eight types of waveforms: DC voltage, gaussian noise, PRBS, pulse, ramp/triangle wave,

sine wave, square wave and arbitrary (user) waveform. Waveform-specific settings exist in the FUNCtion subsystem.

You can also query current output configuration (APPLy?).

General Remarks

Amplitude

l Changing amplitude may briefly disrupt output at certain voltages due to output attenuator switching. The ampli-

tude is controlled, however, so the output voltage will never exceed the current setting while switching ranges. To

prevent this disruption, disable voltage autoranging using VOLTage:RANGe:AUTO OFF. The APPLy command auto-

matically enables autoranging.

l Limits Due to Output Termination: The offset range depends on the output termination setting. For example, if

you set offset to 100 mVDC and then change output termination from 50 Ω to "high impedance," the offset volt-

age displayed on the front panel doubles to 200 mVDC (no error is generated). If you change from "high imped-

ance" to 50 Ω, the displayed offset voltage will be halved. See OUTPut[1|2]:LOAD for details.

l Limits Due to Unit Selection: The amplitude limits are determined by the output units selected.

l You cannot specify output amplitude in dBm if output termination is set to high impedance.The units are auto-

matically converted to Vpp.

Agilent 33500 Series Operating and Service Guide 163

Agilent Technologies Agilent 33500 Series User Manual

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